3 Sunscreen Application Rules Most People Get Wrong

Use a full shot glass for your body and a nickel-sized dollop for your face The SPF number on the bottle is tested at 2 mg per square centimeter of skin. That means roughly 1 ounce for your whole body and about a teaspoon for your face and neck.

Apply half that amount and you cut your protection in half Most people use too little, turning SPF 30 into effectively SPF 15. That might be fine for a quick errand but not for extended sun exposure.

Reapply every two hours or after swimming and sweating Sunscreen breaks down over time. A single application won’t last all day, no matter how much you use.